System and method for adjusting carbon dioxide concentration in indoor atmospheres

a technology of carbon dioxide concentration and indoor atmosphere, which is applied in the direction of membranes, heating types, separation processes, etc., can solve the problems of high energy cost of what is largely building cosub>2, significant amount of energy wasted in excessive ventilation to dilute indoor air, and achieve the effect of reducing a partial pressure of carbon dioxid
US20180257027A1Active Publication Date: 2018-09-13XEROX CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
XEROX CORP
Publication Date
2018-09-13

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Abstract

An electrochemical device suited to modifying a carbon dioxide concentration in an interior space includes a cathode chamber with an inlet which receives a feed gas containing carbon dioxide. A reduction catalyst layer in the cathode chamber reduces carbon dioxide in the gas to form an ionic carrier species. An anode chamber with an outlet outputs a gas comprising carbon dioxide. A solid electrolyte membrane spaces the anode chamber from the cathode chamber and transports the ionic carrier species between the cathode chamber and the anode chamber. The membrane includes an ionic liquid. An oxidation catalyst layer in the anode chamber oxidizes the ionic carrier species to form carbon dioxide. A voltage source provides a voltage difference across the membrane.
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Description

[0001] This application claims the priority of U.S. Provisional Application No. 62 / 468,350, filed Mar. 7, 2017, and U.S. Provisional Application No. 62 / 468,332, filed Mar. 7, 2017, both entitled SYSTEM AND METHOD FOR EFFECTIVELY REMOVING INDOOR CO2, by Vedharathinam, et al., the disclosures of which are incorporated herein in their entireties.BACKGROUND

[0002] The exemplary embodiment relates to regulation of carbon dioxide concentrations in the atmosphere of an enclosed space. It finds particular application in connection with an apparatus and method for reducing carbon dioxide from indoor air.

[0003] Various methods have been used to adjust the carbon concentration in indoor air. In commercial buildings, frequent ventilation using outdoor air (generally 300-400 ppm carbon dioxide, or less) is often used to ensure that indoor air is maintained at ASHRAE-recommended levels (ASHRAE Standard, Ventilation for Indoor Air Quality, 2003). The cost of ventilation can be quite high. For example,...

Claims

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